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Old 16-03-2017, 12:23 PM
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Shiraz (Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,918
if you can get up to 60 minute subs, you will make a signifcant difference Paul - the read noise component will drop to about 0.6 of the level at 20 minutes.

from a sensitivity perspective, your scope is functionally equivalent to Mike's, with the same aperture and roughly the same sampling.
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